<html>
<META http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<head>
<title>Section 14.1.&nbsp; Introduction</title>
<link rel="STYLESHEET" type="text/css" href="images/style.css">
<link rel="STYLESHEET" type="text/css" href="images/docsafari.css">
</head>
<body>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr><td><div STYLE="MARGIN-LEFT: 0.15in;"><a href="toc.html"><img src="images/team.gif" width="60" height="17" border="0" align="absmiddle"  alt="Team BBL"></a></div></td>
<td align="right"><div STYLE="MARGIN-LEFT: 0.15in;">
<a href=ch14.html><img src="images/prev.gif" width="60" height="17" border="0" align="absmiddle" alt="Previous Page"></a>
<a href=ch14lev1sec2.html><img src="images/next.gif" width="60" height="17" border="0" align="absmiddle" alt="Next Page"></a>
</div></td></tr></table>
<br><table width="100%" border="0" cellspacing="0" cellpadding="0"><tr><td valign="top"><a name="ch14lev1sec1"></a>
<h3 class="docSection1Title">14.1. Introduction</h3>
<p class="docText"><a name="idd1e98201"></a><a name="idd1e98206"></a><a name="idd1e98211"></a><a name="idd1e98214"></a><a name="idd1e98219"></a><a name="idd1e98224"></a><a name="idd1e98229"></a><a name="idd1e98234"></a><a name="idd1e98237"></a><a name="idd1e98240"></a>This chapter covers numerous topics and functions that we lump under the term <span class="docEmphasis">advanced I/O</span>: nonblocking I/O, record locking, System V STREAMS, I/O multiplexing (the <tt>select</tt> and <tt>poll</tt> functions), the <tt>readv</tt> and <tt>writev</tt> functions, and memory-mapped I/O (<tt>mmap</tt>). We need to cover these topics before describing interprocess communication in <a class="docLink" href="ch15.html#ch15">Chapter 15</a>, <a class="docLink" href="ch17.html#ch17">Chapter 17</a>, and many of the examples in later chapters.</P>

<a href="17021535.html"><img src="images/pixel.gif" alt="" width="1" height="1" border="0"></a><UL></ul></TD></TR></table>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr><td><div STYLE="MARGIN-LEFT: 0.15in;"><a href="toc.html"><img src="images/team.gif" width="60" height="17" border="0" align="absmiddle"  alt="Team BBL"></a></div></td>
<td align="right"><div STYLE="MARGIN-LEFT: 0.15in;">
<a href=ch14.html><img src="images/prev.gif" width="60" height="17" border="0" align="absmiddle" alt="Previous Page"></a>
<a href=ch14lev1sec2.html><img src="images/next.gif" width="60" height="17" border="0" align="absmiddle" alt="Next Page"></a>
</div></td></tr></table>
</body></html><br>
<table width="100%" cellspacing="0" cellpadding="0"
style="margin-top: 0pt; border-collapse: collapse;"> 
<tr> <td align="right" style="background-color=white; border-top: 1px solid gray;"> 
<a href="http://www.zipghost.com/" target="_blank" style="font-family: Tahoma, Verdana;
 font-size: 11px; text-decoration: none;">The CHM file was converted to HTM by Trial version of <b>ChmD<!--93-->ecompiler</b>.</a>
</TD>
</TR><tr>
<td align="right" style="background-color=white; "> 
<a href="http://www.etextwizard.com/download/cd/cdsetup.exe" target="_blank" style="font-family: Tahoma, Verdana;
 font-size: 11px; text-decoration: none;">Download <b>ChmDec<!--93-->ompiler</b> at: http://www.zipghost.com</a>
</TD></tr></table>
